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以ＨＣｌ，然后加入ＨＮＯ３在水浴上加热来分解单矿物，使单矿物中的硒以Ｓｅ（Ⅳ）的形式存在于溶液中，并用硒的空心阴极灯作为光源，在１０％的ＨＣ１介质中用４％的ＮａＢＨ４溶液作为还原剂，使溶液中的Ｓｅ（Ⅳ）转化成Ｈ２Ｓｅ，再利用氮气作载气将Ｈ２Ｓｅ送入高温石英管中原子化而进行原子吸收光谱分析。本文用ＥＤＴＡ掩蔽和０．００５％双硫踪的ＣＣ１４溶液萃取的联合方法，消除了研究对象：黄铁矿、闪锌矿、方铅矿中共存元素的干扰。本方法的灵敏度为：１．０ｎｇ／１％吸收。
HCl was added and then HNO3 was added to heat in a water bath to decompose the mono-mineral so that the selenium in the mono-mineral was present in the solution in the form of Se (IV) and the hollow cathode lamp with selenium was used as the light source in 10% HCl medium 4% NaBH4 solution as a reducing agent, the solution of Se (Ⅳ) into H2Se, and then use nitrogen as a carrier gas into the high-temperature quartz tube H2Se atomization and atomic absorption spectrometry. In this paper, the combined method of EDTA masking and CC14 solution extraction with 0.005% bisulfide eliminates the interference of the coexisting elements in pyrite, sphalerite and galena. The sensitivity of the method is: 1.0 ng / 1% absorption.